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| Law of Ultimate Bearing Capacity of Front Steering Axle-beam Components with Defects |
| Received:August 31, 2022 Revised:November 01, 2022 |
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| DOI：10.7643/issn.1672-9242.2023.04.001 |
| KeyWord:fragment penetration prefabrication defects load bearing capacity steering axle failure analysis numerical simulation |
| Author | Institution |
| GONG Xiao-kang |
College of Sciences, National University of Defense Technology, Changsha , China |
| LI Xiang-yu |
College of Sciences, National University of Defense Technology, Changsha , China |
| TIAN Zhan-dong |
College of Sciences, National University of Defense Technology, Changsha , China |
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| Abstract: |
| The work aims to study the law of ultimate bearing capacity of damaged front steering axle-beams. A numerical simulation study was carried out on the damage results of a front steering axle-beam under high-speed penetration of fragments. The penetration trajectory of the fragments penetrating into different parts of the front steering axle-beam was determined. A numerical simulation of the vertical load bearing capacity of the front steering axle-beam with penetration defects was carried out. The results showed that the penetration trajectory of the fragments penetrating into different parts of the front steering axle-beam was about circular through hole. For the circular hole defect with a diameter of 1 cm, when it was located in the non-vulnerable area, the front beam broke in the vulnerable area when it reached the ultimate bearing capacity, which was about 70% of that without defects. When it was located in the vulnerable area, the crack passed through the round hole when the front beam reached the ultimate bearing capacity, which was about 60% of that without defects. With a typical vehicle as an example, it was calculated that when the diameter of the circular hole defect in the vulnerable area of the front beam of the vehicle reached 1.8 cm, plastic yield occurred to the front beam under the dead weight of the vehicle. The ultimate bearing capacity of front steering axle-beams is affected by the size and location of the defect. The larger the defect size, the smaller the ultimate bearing capacity of the front beams. When the defect is located in the vulnerable area, the ultimate bearing capacity of the front beams is smaller than that of the defect with the same size located in the non-vulnerable area. The results can provide a reference for the functional failure analysis of the steering axle-beams. |
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